Some things are completely obvious unless you are unfamiliar, and just hearing you work through this and say "if it reads higher than it should, then it suggests there is a problem with the resistor" really worked for me, and I thank you. Some may laugh at that statement, but I really appreciate the way you just talk your way through these videos (with added text comments wherever needed!) and let us hear your thought processes as you explain how you expect a circuit to work vs what you find as you probe with the meter. I'm not sure you can appreciate how helpful your videos are in enabling people to understand and repair all kinds of electronic equipment, but I certainly appreciate your work and wish you the best for 2023.
The only cost to save this PSU from becoming e-waste was a € 0,01 resistor and one hour of work. Imagine how many poor electronic devices could've been spared from eternal doom if someone cared to have a look at their internals. I enjoyed the clear explanation of how these kind of PSU's work. They don't come with a schematic in the box, unfortunately.
thank you very much Richard this is the content we love, your explanation was excellent and I learnt a lot. I hope to see more ATX power supplies, graphics cards, motherboards, laptops repairs. Etc in the future. Have you considered doing some game console repairs as they do seem to draw a large audience.. Even if you are not familiar or experienced in repairing these you could do trying to fix consoles repairs which I think would be very interesting and entertaining. All the best for the future with your UA-cam channel.it's my number one channel.
@@LearnElectronicsRepair Yeah it is, you do spot a few car booty ones so it's something I'd like to see too, PS1 PSU, XBOX everything, N64 PSU, I bet there's some interesting things you can bring home, fix and flip on fleabay using the same methods you value your PC bits.
Love how your drew out that typical circuit on paper and then used the knowledge go back to the circuit and explain what to look for and how it all works. almost like SMPS in a nutshell. Really got a lot out of this, thanks. Two thumbs up.
Thanks to the circuit that you have drawn in this video, I was able to fix a 700 watt Thermaltake PSU. It is like you have created a library or an encyclopedia with this channel. Richard, you should publish a book with those circuits that you are drawing in your videos. I would absolutely buy it :D Great work as always, thank you for your help.
Yeah, if subscribers keep watching videos I get some income from the advertising they watch so I figured it's a good idea to keep them alive 🤑 That was a joke by the way, before anyone starts chewing my ear 🤐
Richard, here's another thought: if you have spillages on any of the motherboards use a bottle with 80% filled with isopropyl alchol and 20% water, why because most spillages appear to be water soluable. Then use a toothbrush to clean it off, better still use a motorized one. Also you could use what is called a flux & boil routine, where you use flux and your heatgun! (I pick my ideas from elsewhere, to help you out.)
Just discovered your channel last night while searching for content to test and repair a digital ballast for a failed flourescent light in the garage. I understand very little of this but I love watching your diagnostic technique and find this type of stuff fascinating. I'm struggling with a printer power supply at the moment and also a car battery charger (digital type) out of lidl. 😄 Thanks for making the video and for taking the time to upload and I wish you a happy, healthy and prosperous new year.
Another great fix and a great instructional video. I think these are the best electronic tutorials on UA-cam. Thank you for the time you put into making them. Cheers
Glad you enjoyed it. The amount of advertising you see is nothing to do with me, this video has exactly the same monetization settings as all the other ones.
@@LearnElectronicsRepair I wasn't referring to UA-cam advertising. These are filtered out by the casting plugin. The sponsors like "PCway" etc tend to detract from the true subject of "Electronics Repair". This is not a complaint. Just an observation.
Thank you very much, I wish I had discovered your channel earlier, it has been a big blessing to me. Once again thank you very much and continue sharing your Wonderful knowledge on electronics
Thanks Richard, I have a computer with a non standard PSU and this might help me with the fix. I haven't expected a resistor being a culprit. That was a surprice for me. Please find another one to fix so we can see a different kind of PSU not working problem. 😍😍😍 THANKS! And a happy new year!
Hi Marcel, I've made a lot of PSU repair videos on the channel - check out the playlist ua-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html I also have another new PSU repair video to publish tomorrow 😉
@@LearnElectronicsRepair Thanks Richard, I still have a lot of videos from your collection in the queue. This one was very interesting mainly because it explains the basics of the PSU's inner workings. Till now I avoided the 320V stuff coz safety, but now I am warming up to it. ⚡⚡⚡
It would be helpful if instead of waving around in the general area with the probe leads, you placed the probes on a given lead or pin and clearly stated what it is you are pointing at, particularly after flipping boards over.
I'm actually learning so much from you. I love this video, you are a Wonderful teacher. PSUs are low value devices, but a high carbon footprint. Would you recommend a repaired power supply over a new power supply? Would you recommend a repaired power supply to a hospital? I likely would given the chance to choose higher quality components. What are your thoughts if you have a second.
richard you do great job there , please make more videos about power supply, so we can learn more about faulty types , if there no short anyware could be resistor , good i didn't expect that , my power supply is FSP 850w gold Hydro G its very complicated it have 6 board inside and have 1450 ohm on green and black what you think its the problem thank you .
Have an amplifier that went down during a brownout a few years back. It was powered on but not in use. I’ve checked all the obvious (fuses, caps, connections) but have no idea where to begin. Any vids of repairs to circuits taken out during a brownout?
Great technique for handling switch mode power supplies Richard. Complacency will kill you! Have you ever tried connecting the input of a SMPS to a low voltage DC supply for testing? Thank you for another interesting video. Regards, David
I've sometimes used my bench supply to power the smps controller chip to see if it oscillates (with no AC input) and also sometimes used a transformer from an old amplifier, I think it was about 90V, to power a SMPS. I actually have an isolation transformer on my bench power socket - the one I use for the the device under test - and this also helps make things safer. Isolation transformers can be a bit hard/expensive to find, but most SMPS will work in the range 85V-240V I would recommend anyone living in a 240V region to get a used 110V site transformer - those yellow things that builders and similar tradesmen use - and power the SMPS from that while working on it. This makes it considerably safer. You can pick a high powered one up for about £25-£35 in the UK - these are actually sold prices on ebay www.ebay.co.uk/sch/i.html?_from=R40&_nkw=110v+transformer&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=ST3+4RP&_sargn=-1%26saslc%3D1&_salic=3&_sop=12&_dmd=1&_ipg=60&LH_Complete=1
@@LearnElectronicsRepair I was referring to actually connecting a DC bench supply to the AC input terminals and running the SMPS as a DC to DC converter. The main advantages are lower voltage on the high side and the "hot" ground can be grounded and then a grounded piece of gear such as an oscilloscope can be used for troubleshooting. Of course the SMPS must not have a load on it. I have used this technique when repairing bench type SMPS with regulation, intermittent operation and noise issues - probably not necessary for short circuits.
Hello from france. Happy new year to all. Thank you for the vidéo, your explanations are excellent, my english isn't very well but i undestood everything ;-) Could you explain more psu basics?
44:06 - I wanna ask something about power of resistors or diameter, since you found the fault, would it be better to use higher wattage resistors but the same resistance? Since that wattage obviously failed? I think its good to good to use higher wattage resistors.
There is so little current flowing through 40 Mega ohms that even if the IC or capacitor was short it would cause almost no wattage. I think there is something about high value resistors in high voltage circuits that causes them to gradually go high resistance, because this is quite common in valve (vacuum tube) circuits which are also high voltage low current. I honestly don't know the physics of this problem, just how to diagnose it.
@@LearnElectronicsRepair I agree, but if we multiply working hours? How many years then months then working hours we get from PSU? Its natural that all components go crazy over some period.
More from Tony I put a cap in and it worked it actually came on a ten volt and a 16 volt in the power up board or the one with the small transformer and it has one transiter,but popped other on a different small it's on a karaoke machine one tray.name Acesonic with USB tony
hi can you elaborate or give schmatics on light bulb idea ? ive seen this on electronics repair for finding shorts but not knowing the schematics on how to create one thanks.
Hi This is Star Gate Electronics in Uitenhage, Try using a microwave Light Bulb with 2 leads with prods from a multi meter to discharge any high voltage on any power supply 's caps🥺
Hi, could you answer a question that is puzzling me? Normal calculation for circuit protection by fuse in plugs 3 pin as per UK standard. Would see a 3 amp fuse in an electrical appliance of 450 Watt.Ref 450 watts divided by 240 volts = 1.875 So why do l find my ATX PSU of 450 watt fitted with a 6 amp 20 mm quick acting glass fuse?
Current is always going to ground. The sum of all the currents flowing through a circuit equals the current flowing into the circuit (from the supply) and the current flowing out of the circuit to ground
Great video , I have a question my pc starts there is the powerled and restarts after 1 second , i checked for shorts on the motherboard atx connector but all is good. What could be the problem? Sometimes 1 in 10 times it starts completely and keeps working.
Some things are completely obvious unless you are unfamiliar, and just hearing you work through this and say "if it reads higher than it should, then it suggests there is a problem with the resistor" really worked for me, and I thank you. Some may laugh at that statement, but I really appreciate the way you just talk your way through these videos (with added text comments wherever needed!) and let us hear your thought processes as you explain how you expect a circuit to work vs what you find as you probe with the meter. I'm not sure you can appreciate how helpful your videos are in enabling people to understand and repair all kinds of electronic equipment, but I certainly appreciate your work and wish you the best for 2023.
The only cost to save this PSU from becoming e-waste was a € 0,01 resistor and one hour of work.
Imagine how many poor electronic devices could've been spared from eternal doom if someone cared to have a look at their internals.
I enjoyed the clear explanation of how these kind of PSU's work. They don't come with a schematic in the box, unfortunately.
This requires knowledge as this could cause death if you will be careless.
You are the best teacher of all of the electronics repair technicians who make videos.
Frank
Frank Reiser Video/Audio Service
thank you very much Richard this is the content we love, your explanation was excellent and I learnt a lot. I hope to see more ATX power supplies, graphics cards, motherboards, laptops repairs. Etc in the future. Have you considered doing some game console repairs as they do seem to draw a large audience.. Even if you are not familiar or experienced in repairing these you could do trying to fix consoles repairs which I think would be very interesting and entertaining. All the best for the future with your UA-cam channel.it's my number one channel.
OK I will keep that in mind, after all it's all just electronics... yeah?
@@LearnElectronicsRepair Yeah it is, you do spot a few car booty ones so it's something I'd like to see too, PS1 PSU, XBOX everything, N64 PSU, I bet there's some interesting things you can bring home, fix and flip on fleabay using the same methods you value your PC bits.
Love how your drew out that typical circuit on paper and then used the knowledge go back to the circuit and explain what to look for and how it all works. almost like SMPS in a nutshell. Really got a lot out of this, thanks. Two thumbs up.
Thanks to the circuit that you have drawn in this video, I was able to fix a 700 watt Thermaltake PSU. It is like you have created a library or an encyclopedia with this channel. Richard, you should publish a book with those circuits that you are drawing in your videos. I would absolutely buy it :D Great work as always, thank you for your help.
What a great way to start the New Year! With more knowledge.
Another master class. Outstanding
Happy New Year, best of luck for 2023 from the 🇬🇧
glad to see you talk about the safety concerns. very good.
Yeah, if subscribers keep watching videos I get some income from the advertising they watch so I figured it's a good idea to keep them alive 🤑
That was a joke by the way, before anyone starts chewing my ear 🤐
@@LearnElectronicsRepair lol.
Hi. I am so pleased about the protection bulb that you used :) I am using it too, it saved me so many times, I could not count...
Learnt something and very nicely explained along with systematic trouble shooting. Excellent.
Richard, here's another thought: if you have spillages on any of the motherboards use a bottle with 80% filled with isopropyl alchol and 20% water, why because most spillages appear to be water soluable. Then use a toothbrush to clean it off, better still use a motorized one. Also you could use what is called a flux & boil routine, where you use flux and your heatgun! (I pick my ideas from elsewhere, to help you out.)
Just discovered your channel last night while searching for content to test and repair a digital ballast for a failed flourescent light in the garage. I understand very little of this but I love watching your diagnostic technique and find this type of stuff fascinating. I'm struggling with a printer power supply at the moment and also a car battery charger (digital type) out of lidl. 😄
Thanks for making the video and for taking the time to upload and I wish you a happy, healthy and prosperous new year.
Thank you, professor, and "Happy New Year" for 2023
Another great fix and a great instructional video. I think these are the best electronic tutorials on UA-cam. Thank you for the time you put into making them. Cheers
Nicely done and explained, you also covered the fact that a circuit is not always true to how you would expect it to be.
fantastic explanation Richard :) happy new year to you :)
Good job. I love to see electronics saved from e waste.
Great video. It was very informative. I only wish you had included video on the replacement of the resistor.
That's very satisfying. I wish I could say I'm now ready to fix a few of these but maybe someday!
Great lesson, thanks!
Thanks for a very informative video on an interesting subject. With no advertising. Hint. Keep up the good work and all the best for 2023 to you too.
Glad you enjoyed it. The amount of advertising you see is nothing to do with me, this video has exactly the same monetization settings as all the other ones.
@@LearnElectronicsRepair I wasn't referring to UA-cam advertising. These are filtered out by the casting plugin. The sponsors like "PCway" etc tend to detract from the true subject of "Electronics Repair". This is not a complaint. Just an observation.
Very nice walk through, explanation and repair of this PSU. HNY to you and your family too
You are blessed with so much knowledge and experience. You are fantastic teacher!
Hi This is Stargate Electronics herein Uitenhage in the Eastern Cape in South Africa. Sorry for adding this info only now
Thank you very much, I wish I had discovered your channel earlier, it has been a big blessing to me. Once again thank you very much and continue sharing your Wonderful knowledge on electronics
Great explanation thanks for taking the time to explain why the different components are used and what to expect when testing. Happy New year
Great watch. Still non the wiser (my fault) great to see you fixing it. Well-done.
Just stick around here and one day you will have a 'light bulb' moment in your head and everything will all come together and make sense
Happy new year to you too, Richard!
Happy New Year Richard. Another super video and brilliantly explained.
Thanks Richard, I have a computer with a non standard PSU and this might help me with the fix. I haven't expected a resistor being a culprit. That was a surprice for me. Please find another one to fix so we can see a different kind of PSU not working problem. 😍😍😍 THANKS! And a happy new year!
Hi Marcel, I've made a lot of PSU repair videos on the channel - check out the playlist
ua-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html
I also have another new PSU repair video to publish tomorrow 😉
@@LearnElectronicsRepair Thanks Richard, I still have a lot of videos from your collection in the queue. This one was very interesting mainly because it explains the basics of the PSU's inner workings. Till now I avoided the 320V stuff coz safety, but now I am warming up to it. ⚡⚡⚡
Great video Richard, I always learn something new - happy new year to you and your wife, all the best from Bradford UK.
Great video Richard! Directly knew where to search for and found the problem!
I learned quiete something in this video!
thank you. That was nice peace of knowledge.
Nice one Richard! I was expecting the usual power device failure.
This should be required reading......cheers and Happy New Year !
Thank you!
Wonderful theory of operation is very helpful for troubleshooting. Thank you.
Absolutely brilliant
Nice analysis and repair . Happy New Year !
Thanks once again Richard. Best wishes for the New Year.
Great video and explanation. Thanks!
I really like how you explain things. Keep it up
Thank you for sharing your knowledge! And happy New Year to everyone!
Well explained, Richard , and a Happy New Year.
Heya, yes 1 more good explained repair video learning every vlog
Great video, Richard.
Thank you for the video and Happy New Year! Keep up the good work on these very informative videos.
Happy New year great teacher. Step by step explanation.
Thanks for the awesome video Richard! Happy new year from 🇺🇸
It would be helpful if instead of waving around in the general area with the probe leads, you placed the probes on a given lead or pin and clearly stated what it is you are pointing at, particularly after flipping boards over.
Very nice fault finding. I have a few faulty PSU-s as well...maybe I'll check them again with your methods. Thanks for the videos.
Many thanks for an excellent video. I thoroughly enjoyed your explanation throughout and I've now subscribed to your channel.
Happy New Year Richard, watched the full recording. Learned allot from this video, I hope I can put this into practice one day !
This was amazing, Thank you so much for taking the time to make these video's.
Thank you my friend! Very informative. Happy New Year mate!
Exellent tutorial ,I have the same problem with ATX power .sply and this is an idea to start the repair thank's mASTER
Brilliant, can you provide schematic for your lightbulb circuit, I know it's basic stuff, but wanna see different implementation
I'm actually learning so much from you. I love this video, you are a Wonderful teacher.
PSUs are low value devices, but a high carbon footprint. Would you recommend a repaired power supply over a new power supply? Would you recommend a repaired power supply to a hospital? I likely would given the chance to choose higher quality components. What are your thoughts if you have a second.
Many thanks for all your video’s and explanations Richard and a very happy new year to you and your family 👍👍
Happy New Year! Great Video again. Thanks
Very good! Happy New year to you also!
Wow! Very nicely explained. Thanks!
I could watch you repair SMPS all day :)
Happy New Year to you Rich.
Thank you HNY👍
Wow, great content, nice to learn form a very experienced guy, thank you very much
This is brilliant
Happy New year, great video.
Hi Richard nice fix
Happy New Years to you also.
Thanks for your post.
richard you do great job there , please make more videos about power supply, so we can learn more about faulty types , if there no short anyware could be resistor , good i didn't expect that , my power supply is FSP 850w gold Hydro G its very complicated it have 6 board inside and have 1450 ohm on green and black what you think its the problem thank you .
Happy New Year to you also.
Very interesting. Thank you.
Happy New Year 🎆
Thanks, great video !
Happy New Year!
Thank you so much for sharing all this knowledge, I have so much since subscribing to your channel.
What usually causes a resistor to fail ?
Have an amplifier that went down during a brownout a few years back. It was powered on but not in use. I’ve checked all the obvious (fuses, caps, connections) but have no idea where to begin. Any vids of repairs to circuits taken out during a brownout?
Great technique for handling switch mode power supplies Richard. Complacency will kill you! Have you ever tried connecting the input of a SMPS to a low voltage DC supply for testing? Thank you for another interesting video. Regards, David
I've sometimes used my bench supply to power the smps controller chip to see if it oscillates (with no AC input) and also sometimes used a transformer from an old amplifier, I think it was about 90V, to power a SMPS. I actually have an isolation transformer on my bench power socket - the one I use for the the device under test - and this also helps make things safer. Isolation transformers can be a bit hard/expensive to find, but most SMPS will work in the range 85V-240V I would recommend anyone living in a 240V region to get a used 110V site transformer - those yellow things that builders and similar tradesmen use - and power the SMPS from that while working on it. This makes it considerably safer. You can pick a high powered one up for about £25-£35 in the UK - these are actually sold prices on ebay
www.ebay.co.uk/sch/i.html?_from=R40&_nkw=110v+transformer&_in_kw=1&_ex_kw=&_sacat=0&LH_Sold=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=ST3+4RP&_sargn=-1%26saslc%3D1&_salic=3&_sop=12&_dmd=1&_ipg=60&LH_Complete=1
@@LearnElectronicsRepair I was referring to actually connecting a DC bench supply to the AC input terminals and running the SMPS as a DC to DC converter. The main advantages are lower voltage on the high side and the "hot" ground can be grounded and then a grounded piece of gear such as an oscilloscope can be used for troubleshooting. Of course the SMPS must not have a load on it. I have used this technique when repairing bench type SMPS with regulation, intermittent operation and noise issues - probably not necessary for short circuits.
what a good repair thanks for the video happy new year
Thanks a loto, great lesson
@Richard .. use cats61flir thermal camera .. 📷 it works much better and can connect to a pc via wifi or USB.. fixed on a desk it's amazing
Inbox me I would like to share the information
Thanks for sharing🙏
thank you very much, it was very informative
Hello from france. Happy new year to all. Thank you for the vidéo, your explanations are excellent, my english isn't very well but i undestood everything ;-) Could you explain more psu basics?
I've made a lot of PSU repair tutorials - here is the playlist, and enjoy
ua-cam.com/play/PLQ_OzNEYrepVLDfbGpAEoPQ7MgNukIxmi.html
Happy new year richard love the videos! By the way did you ever fix that powered mixing desk? Waiting for a part...... I dunno 10? Lol
44:06 - I wanna ask something about power of resistors or diameter, since you found the fault, would it be better to use higher wattage resistors but the same resistance?
Since that wattage obviously failed? I think its good to good to use higher wattage resistors.
There is so little current flowing through 40 Mega ohms that even if the IC or capacitor was short it would cause almost no wattage. I think there is something about high value resistors in high voltage circuits that causes them to gradually go high resistance, because this is quite common in valve (vacuum tube) circuits which are also high voltage low current. I honestly don't know the physics of this problem, just how to diagnose it.
@@LearnElectronicsRepair I agree, but if we multiply working hours? How many years then months then working hours we get from PSU? Its natural that all components go crazy over some period.
Thank you very much
Happy new year
Happy new year from devon uk
Hi Richard tk here I was wondering if you could comment on why I'm popping caps on my unit I'm working on thanks Richard your tops 😅tony
More from Tony I put a cap in and it worked it actually came on a ten volt and a 16 volt in the power up board or the one with the small transformer and it has one transiter,but popped other on a different small it's on a karaoke machine one tray.name Acesonic with USB tony
Nice work. 🥂
hi can you elaborate or give schmatics on light bulb idea ? ive seen this on electronics repair for finding shorts but not knowing the schematics on how to create one thanks.
Hi This is Star Gate Electronics in Uitenhage,
Try using a microwave Light Bulb with 2 leads with prods from a multi meter to discharge any high voltage on any power supply 's caps🥺
Hi, could you answer a question that is puzzling me?
Normal calculation for circuit protection by fuse in plugs 3 pin as per UK standard.
Would see a 3 amp fuse in an electrical appliance of 450 Watt.Ref 450 watts divided by 240 volts = 1.875
So why do l find my ATX PSU of 450 watt fitted with a 6 amp 20 mm quick acting glass fuse?
I'm not good at this. It always seems to me that, if current takes the path of least resistance, then why is it not just always going to the ground?
Current is always going to ground. The sum of all the currents flowing through a circuit equals the current flowing into the circuit (from the supply) and the current flowing out of the circuit to ground
Great video , I have a question my pc starts there is the powerled and restarts after 1 second , i checked for shorts on the motherboard atx connector but all is good. What could be the problem? Sometimes 1 in 10 times it starts completely and keeps working.